How to convert a unmanaged structure pointer to byte[] in c#?

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Please help me to convert a unmanaged structure pointer to byte[] in c#?

C#

public struct struct1
{
    public byte a; 
    public int b; 
}

struct1 objstruct= new struct1();
struct1* ptrStruct=&objstruct;
ptrStruct->a=1;
ptrStruct->b=4;

how can i convert ptrStructo byte[]?

please help me

Posted 26-Sep-13 15:55pm

pbshines

Updated 26-Sep-13 20:36pm

walterhevedeich

v2

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Sampath Lokuge · Answer 1 · 2013-09-26T21:37:00

Solution 1

Why you have to convert ? Just create your own class is as below and use it for your app.

C#

public class ClassName
   {
    public byte [] a { get; set; }
    public int b { get; set; }
   }

I hope this will help to you.

Posted 26-Sep-13 21:37pm

Sampath Lokuge

V.Lorz · Answer 2 · 2013-09-26T23:27:00

If you need to pass one managed structure to unmanaged code you could do it like in the foollowing example (taken from: MSDN[^]):

C#

using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential)]
public struct Point {
    public int x;
    public int y;
}   

[StructLayout(LayoutKind.Explicit)]
public struct Rect {
    [FieldOffset(0)] public int left;
    [FieldOffset(4)] public int top;
    [FieldOffset(8)] public int right;
    [FieldOffset(12)] public int bottom;
}   

class Win32API {
    [DllImport("User32.dll")]
    public static extern bool PtInRect(ref Rect r, Point p);
}

If you want to pass the array to the unmanaged function this could also help: MSDN[^]

For consuming functions from windows APIs pinvoke.net/[^] has very usefull resources and sample code you could use.